\begin{tabular}{llll}
\toprule
{} &  $\sigma$ &    $\phi$ & $\alpha_0$ \\
\midrule
estimate &  2.097183 &   0.30414 &   0.168902 \\
se       &  0.010304 &  0.135992 &   0.019482 \\
\bottomrule
\end{tabular}
